Composites Part A: Applied Science and Manufacturing最新文献

英文中文

Two-step phase-separated ANF/polyimide aerogel fibers with tunable in situ core-sheath structure for wearable heat-insulated fabrics 用于可穿戴隔热织物的具有可调原位芯鞘结构的两步相分离 ANF/聚酰亚胺气凝胶纤维

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-12 DOI: 10.1016/j.compositesa.2025.108801

Zhilin Chen , Xianbo Hou , Jia Chen , Shuyan Nie , Shaowei Zhu , Tao Liu , Liming Chen

Aerogel fibers have exhibited crucial application prospects in wearable heat-insulated fabrics. However, developing aerogel fibers with robust mechanical performance and high flexibility remains challenging due to their inherent fragility caused by high porosity. Herein, aramid nanofibers (ANF) reinforced polyimide (PI) aerogel fibers (ANF/PIAFs) are presented with tunable in situ core-sheath structure for super-flexible and super-toughness wearable heat-insulated fabrics by a novel two-step (2Step) phase separation strategy. The results demonstrate that the formation of sheath thickness and pore morphology of aerogel fibers can be tuned by the phase separation steps. Attributed to the core-sheath structure and the entanglement of chains with the introduction of ANF nanofibers, the tough and flexible ANF/PIAFs demonstrate improved tensile modulus (748.53 MPa), tensile strength (51.94 MPa) and fracture energy (18.28 MJ/m³) by 2.5 times, 11.5 times, and 288.2 times compared with the unprocessed PI aerogel fibers. Moreover, the addition of ANF effectively inhibits the shrinkage of aerogel fibers, which maintains the high thermal insulation ability (0.034 W/(m·K)). The strategy outlined in this study introduces a novel and universal method for fabricating aerogel fibers with a core-sheath structure using the improved phase separation technique, demonstrating the promising potential for applications in flexible thermal-insulated fabrics.

{"title":"Two-step phase-separated ANF/polyimide aerogel fibers with tunable in situ core-sheath structure for wearable heat-insulated fabrics","authors":"Zhilin Chen , Xianbo Hou , Jia Chen , Shuyan Nie , Shaowei Zhu , Tao Liu , Liming Chen","doi":"10.1016/j.compositesa.2025.108801","DOIUrl":"10.1016/j.compositesa.2025.108801","url":null,"abstract":"<div><div>Aerogel fibers have exhibited crucial application prospects in wearable heat-insulated fabrics. However, developing aerogel fibers with robust mechanical performance and high flexibility remains challenging due to their inherent fragility caused by high porosity. Herein, aramid nanofibers (ANF) reinforced polyimide (PI) aerogel fibers (ANF/PIAFs) are presented with tunable in situ core-sheath structure for super-flexible and super-toughness wearable heat-insulated fabrics by a novel two-step (2Step) phase separation strategy. The results demonstrate that the formation of sheath thickness and pore morphology of aerogel fibers can be tuned by the phase separation steps. Attributed to the core-sheath structure and the entanglement of chains with the introduction of ANF nanofibers, the tough and flexible ANF/PIAFs demonstrate improved tensile modulus (748.53 MPa), tensile strength (51.94 MPa) and fracture energy (18.28 MJ/m<sup>3</sup>) by 2.5 times, 11.5 times, and 288.2 times compared with the unprocessed PI aerogel fibers. Moreover, the addition of ANF effectively inhibits the shrinkage of aerogel fibers, which maintains the high thermal insulation ability (0.034 W/(m·K)). The strategy outlined in this study introduces a novel and universal method for fabricating aerogel fibers with a core-sheath structure using the improved phase separation technique, demonstrating the promising potential for applications in flexible thermal-insulated fabrics.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108801"},"PeriodicalIF":8.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear rheological and thermo-oxidative aging behaviors of carbon black filled natural rubber nanocomposites mediated by a deep eutectic solvent based on 4-methyl-5,7-dihydroxycoumarin and tetrabutylammonium bromide

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-11 DOI: 10.1016/j.compositesa.2025.108798

Benteng Liu , Yihu Song , Miao Du , Qiang Zheng

Deep eutectic solvents (DESs) are able to promote vulcanization and improve mechanical properties of rubber nanocomposites. Investigated are rheological and thermo-oxidative aging behaviors of carbon black (CB) filled natural rubber (NR) nanocomposites mediated by a developed DES, revealing that the presence of DES could significantly promote vulcanization of NR and dispersibility of CB, the latter being related to polar interactions between DES and CB. DES interferes with the Payne effect by improving the onset strain amplitude and weakening the storage modulus decay and the loss modulus overshoot in the nonlinear viscoelasticity region without influencing mechanisms of Mullins effect during cyclic uniaxial tension at large strains. During long-term thermo-oxidative aging, DES influences the evolutions of mechanical properties and Mullins effect depending on the composition. This work is helpful for mediating the CB dispersity, NR crosslinking, strain softening and thermal-oxidative aging behavior of NR nanocomposites for design and manufacture of high-performance products.

{"title":"Nonlinear rheological and thermo-oxidative aging behaviors of carbon black filled natural rubber nanocomposites mediated by a deep eutectic solvent based on 4-methyl-5,7-dihydroxycoumarin and tetrabutylammonium bromide","authors":"Benteng Liu , Yihu Song , Miao Du , Qiang Zheng","doi":"10.1016/j.compositesa.2025.108798","DOIUrl":"10.1016/j.compositesa.2025.108798","url":null,"abstract":"<div><div>Deep eutectic solvents (DESs) are able to promote vulcanization and improve mechanical properties of rubber nanocomposites. Investigated are rheological and thermo-oxidative aging behaviors of carbon black (CB) filled natural rubber (NR) nanocomposites mediated by a developed DES, revealing that the presence of DES could significantly promote vulcanization of NR and dispersibility of CB, the latter being related to polar interactions between DES and CB. DES interferes with the Payne effect by improving the onset strain amplitude and weakening the storage modulus decay and the loss modulus overshoot in the nonlinear viscoelasticity region without influencing mechanisms of Mullins effect during cyclic uniaxial tension at large strains. During long-term thermo-oxidative aging, DES influences the evolutions of mechanical properties and Mullins effect depending on the composition. This work is helpful for mediating the CB dispersity, NR crosslinking, strain softening and thermal-oxidative aging behavior of NR nanocomposites for design and manufacture of high-performance products.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108798"},"PeriodicalIF":8.1,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A wide range of strain rate sensitivity and impact-induced behavior of Al/PTFE reactive materials: Experimental and numerical investigation

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-11 DOI: 10.1016/j.compositesa.2025.108797

Xinxin Ren , Jinchun Liu , Jiaxiang Wu , Yuchun Li , Yan Tu , Zhengwei Meng

Under impact loading, Al/PTFE reactive materials demonstrate notable strain rate sensitivity and impact-induced ignition. To investigate the influence of impact velocity, Al/PTFE composites (26.5 %/73.5 %) with 35 μm Al particles were synthesized and subjected to quasi-static and dynamic compression experiments. Results revealed a bilinear logarithmic relationship between stress and strain rate. A two-stage simplified Johnson-Cook (JC) model was calibrated to determine its mechanical properties and the parameters were validated by numerical simulations matching the experimental results. Extended simulations analyzed a wide range of strain rate sensitivities and established a dynamic increase factor (DIF) formulation that accurately describes the dynamic mechanical response of the material. These findings provide a robust basis for material selection and performance prediction, supported by comparisons with existing literature.

引用次数: 0

Self-assembling biomimetic coating composed of 1D/2D CNT/polydopamine modified GO hybrid for solving conflict between carbon fiber-epoxy adhesion strength and fracture toughness

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-11 DOI: 10.1016/j.compositesa.2025.108800

Yating Li , Qing Wu , Ziyi Ye , Renjie Yao , Dan Jin , Min Zhao , Jianfeng Zhu

Tackling the intractable contradiction of interfacial strength-toughness is critical. Herein, shell nacre-mimetic coating composed of carbon nanotube (CNT) reinforced polyether amine (PEA)-polydopamine (PDA) and PDA functionalized graphene oxide (GO@PDA) was self-assembled around carbon fiber via a facile, green, low-cost but effective technique of vacuum filtration to fulfill the amplification of synergy effects of GO and CNTs under the constraint of delicate layered architecture. Contents of CNTs and GO@PDA were compared to optimize the performances. When 0.2 g GO@PDA and 5 ml CNTs were added, amazing growths in interfacial shear strength and fracture toughness of 114.2 % and 348.7 % were achieved, relative to untreated fiber composites. Increase in interfacial adhesion is associated with synergistic interactions of covalent and hydrogen bonds, π-π stacking along with mechanical pinning at interphase, while advance in interfacial toughness assigns with crack propagation, stretching deformation, and breakage of hydrogen bridge and π-π interaction that dissipate energy.

{"title":"Self-assembling biomimetic coating composed of 1D/2D CNT/polydopamine modified GO hybrid for solving conflict between carbon fiber-epoxy adhesion strength and fracture toughness","authors":"Yating Li , Qing Wu , Ziyi Ye , Renjie Yao , Dan Jin , Min Zhao , Jianfeng Zhu","doi":"10.1016/j.compositesa.2025.108800","DOIUrl":"10.1016/j.compositesa.2025.108800","url":null,"abstract":"<div><div>Tackling the intractable contradiction of interfacial strength-toughness is critical. Herein, shell nacre-mimetic coating composed of carbon nanotube (CNT) reinforced polyether amine (PEA)-polydopamine (PDA) and PDA functionalized graphene oxide (GO@PDA) was self-assembled around carbon fiber via a facile, green, low-cost but effective technique of vacuum filtration to fulfill the amplification of synergy effects of GO and CNTs under the constraint of delicate layered architecture. Contents of CNTs and GO@PDA were compared to optimize the performances. When 0.2 g GO@PDA and 5 ml CNTs were added, amazing growths in interfacial shear strength and fracture toughness of 114.2 % and 348.7 % were achieved, relative to untreated fiber composites. Increase in interfacial adhesion is associated with synergistic interactions of covalent and hydrogen bonds, π-π stacking along with mechanical pinning at interphase, while advance in interfacial toughness assigns with crack propagation, stretching deformation, and breakage of hydrogen bridge and π-π interaction that dissipate energy.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108800"},"PeriodicalIF":8.1,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and hetero-interfacial engineering of magnetic bimetallic composites based polyurethane microwave absorbing coating for marine environment

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-08 DOI: 10.1016/j.compositesa.2025.108770

Qiaoqiao Han , Junhuai Xu , Jianyang Shi , Mi Zhou , Haibo Wang , Liang Geng , Junjie Xiong , Zongliang Du

Construction of microwave-absorbing materials adapted to marine application scenarios remain a challenge. Herein, environmentally stable Co_xNi_y@C absorbers are fabricated. The CoNi-C heterogeneous interface in these absorbers induces a more inhomogeneous space charge distribution than Co-C and Ni-C interfaces, contributing to strong hetero-interfacial polarization and thereby improving microwave absorption performance. The C2 absorber demonstrated an EAB of 5.68 GHz, covering the entire Ku-band at a thickness of 1.98 mm. Additionally, simulations revealed an excellent radar stealth effect in unmanned aerial vehicle (UAV) mode. The 3D graphite skeleton of the absorber can extend the diffusion path of corrosive media and facilitate bacterial deposition, producing synergistic anti-corrosion and antibacterial effects. After immersion in a 3.5 % NaCl solution for 47 days, the |Z|_0.01Hz value of polyurethane (PU)/C2 coating remained at 6.32 × 10⁸ Ω cm², indicating superior anticorrosion characteristics. The antibacterial rates of C2 reached 99.77 % against Escherichia coli and 99.11 % against Staphylococcus aureus. This work offers fresh concepts for the development of next-generation multifunctional microwave absorbents.

{"title":"Structural and hetero-interfacial engineering of magnetic bimetallic composites based polyurethane microwave absorbing coating for marine environment","authors":"Qiaoqiao Han , Junhuai Xu , Jianyang Shi , Mi Zhou , Haibo Wang , Liang Geng , Junjie Xiong , Zongliang Du","doi":"10.1016/j.compositesa.2025.108770","DOIUrl":"10.1016/j.compositesa.2025.108770","url":null,"abstract":"<div><div>Construction of microwave-absorbing materials adapted to marine application scenarios remain a challenge. Herein, environmentally stable Co<sub>x</sub>Ni<sub>y</sub>@C absorbers are fabricated. The CoNi-C heterogeneous interface in these absorbers induces a more inhomogeneous space charge distribution than Co-C and Ni-C interfaces, contributing to strong hetero-interfacial polarization and thereby improving microwave absorption performance. The C2 absorber demonstrated an EAB of 5.68 GHz, covering the entire Ku-band at a thickness of 1.98 mm. Additionally, simulations revealed an excellent radar stealth effect in unmanned aerial vehicle (UAV) mode. The 3D graphite skeleton of the absorber can extend the diffusion path of corrosive media and facilitate bacterial deposition, producing synergistic anti-corrosion and antibacterial effects. After immersion in a 3.5 % NaCl solution for 47 days, the |Z|<sub>0.01Hz</sub> value of polyurethane (PU)/C2 coating remained at 6.32 × 10<sup>8</sup> Ω cm<sup>2</sup>, indicating superior anticorrosion characteristics. The antibacterial rates of C2 reached 99.77 % against <em>Escherichia coli</em> and 99.11 % against <em>Staphylococcus aureus</em>. This work offers fresh concepts for the development of next-generation multifunctional microwave absorbents.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108770"},"PeriodicalIF":8.1,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the ply-wise investigation of the crystalline morphology distribution of in-situ consolidated CF/PEEK composite using Wide-Angle X-ray scattering (WAXS)

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-07 DOI: 10.1016/j.compositesa.2025.108792

Shafaq Shafaq , Matthew J. Donough , Ashleigh L. Farnsworth , Andrew W. Phillips , Gleny Chirima , Nigel A. St John , B. Ben Arber , Kilahney Murphy , Gangadhara Prusty

In-situ consolidated thermoplastic composites using automated fibre placement (AFP) experience highly localised and transient heating and cooling cycles during the process. Hence, the in-situ consolidation process can lead to significant fluctuations in polymer properties across the full part volume. The fluctuation in properties is primarily due to variations in cooling rates during the melting process and the number of high-temperature cycles experienced at each point. This paper presents the first study investigating the localised ply-wise crystalline properties of a Polyether-ether-ketone (PEEK) polymer matrix in a hot gas torch assisted in-situ consolidated carbon fibre PEEK composite with varying processing parameters using wide-angle X-ray scattering (WAXS) conducted on SAXS/WAXS beamline. The results demonstrate that crystallinity, and crystal orientation fraction exhibit ply-wise. However, maximum tool surface heating achieves a more uniform morphology. By integrating both orientation and crystallinity, a comprehensive strategy for optimising the mechanical performance of polymer materials can be developed.

{"title":"On the ply-wise investigation of the crystalline morphology distribution of in-situ consolidated CF/PEEK composite using Wide-Angle X-ray scattering (WAXS)","authors":"Shafaq Shafaq , Matthew J. Donough , Ashleigh L. Farnsworth , Andrew W. Phillips , Gleny Chirima , Nigel A. St John , B. Ben Arber , Kilahney Murphy , Gangadhara Prusty","doi":"10.1016/j.compositesa.2025.108792","DOIUrl":"10.1016/j.compositesa.2025.108792","url":null,"abstract":"<div><div><em>In-situ</em> consolidated thermoplastic composites using automated fibre placement (AFP) experience highly localised and transient heating and cooling cycles during the process. Hence, the <em>in-situ</em> consolidation process can lead to significant fluctuations in polymer properties across the full part volume. The fluctuation in properties is primarily due to variations in cooling rates during the melting process and the number of high-temperature cycles experienced at each point. This paper presents the first study investigating the localised ply-wise crystalline properties of a Polyether-ether-ketone (PEEK) polymer matrix in a hot gas torch assisted <em>in-situ</em> consolidated carbon fibre PEEK composite with varying processing parameters using wide-angle X-ray scattering (WAXS) conducted on SAXS/WAXS beamline. The results demonstrate that crystallinity, and crystal orientation fraction exhibit ply-wise. However, maximum tool surface heating achieves a more uniform morphology. By integrating both orientation and crystallinity, a comprehensive strategy for optimising the mechanical performance of polymer materials can be developed.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108792"},"PeriodicalIF":8.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A review on energy-efficient manufacturing for high-performance fibre-reinforced composites

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-06 DOI: 10.1016/j.compositesa.2025.108779

Yushen Wang , Thomas D.S. Thorn , Yi Liu , Suresh G. Advani , Dimitrios G. Papageorgiou , Emiliano Bilotti , Han Zhang

Traditional manufacturing methods for high-performance fibre-reinforced plastics are often energy intensive and therefore unviable in achieving the sustainable development of the field. With advanced composites extensively used in aerospace, automotive, and renewable energy sectors, there is an urgent need to rethink manufacturing processes to meet sustainability targets and reduce energy consumption. Conventional methods such as autoclave curing and resin transfer moulding are often constrained by energy inefficiency, chamber size limitations, and high capital costs, inevitably hindering progress toward clean growth in composites. This paper provides a state-of-the-art review of the energy-efficient curing methods for continuous fibre-reinforced composites, from direct electric heating of carbon fibres and nanocomposites, induction heating, microwave heating, to frontal polymerisations, with a full coverage on curing mechanisms, requirements of materials, and energy efficiency and consumptions of each method. A detailed comparison of these curing methods with a forward looking perspective is also included, providing a guideline for adopting energy-efficient composite manufacturing methods across various applications.

{"title":"A review on energy-efficient manufacturing for high-performance fibre-reinforced composites","authors":"Yushen Wang , Thomas D.S. Thorn , Yi Liu , Suresh G. Advani , Dimitrios G. Papageorgiou , Emiliano Bilotti , Han Zhang","doi":"10.1016/j.compositesa.2025.108779","DOIUrl":"10.1016/j.compositesa.2025.108779","url":null,"abstract":"<div><div>Traditional manufacturing methods for high-performance fibre-reinforced plastics are often energy intensive and therefore unviable in achieving the sustainable development of the field. With advanced composites extensively used in aerospace, automotive, and renewable energy sectors, there is an urgent need to rethink manufacturing processes to meet sustainability targets and reduce energy consumption. Conventional methods such as autoclave curing and resin transfer moulding are often constrained by energy inefficiency, chamber size limitations, and high capital costs, inevitably hindering progress toward clean growth in composites. This paper provides a state-of-the-art review of the energy-efficient curing methods for continuous fibre-reinforced composites, from direct electric heating of carbon fibres and nanocomposites, induction heating, microwave heating, to frontal polymerisations, with a full coverage on curing mechanisms, requirements of materials, and energy efficiency and consumptions of each method. A detailed comparison of these curing methods with a forward looking perspective is also included, providing a guideline for adopting energy-efficient composite manufacturing methods across various applications.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108779"},"PeriodicalIF":8.1,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lightweight, thermal-insulating, flame-retardant Co@CNT composite carbon foam for efficient broadband electromagnetic wave absorption

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-06 DOI: 10.1016/j.compositesa.2025.108791

Cuiqing Zhou , Junyu Lu , Mushan Yuan , Long Ni , Haichao Meng , Shaoyu Qiu , Mei Liang , Yinfu Luo , Huawei Zou

Constructing efficient and multifunctional integrated electromagnetic wave (EMW) absorbing materials is an effective strategy to address the complex electromagnetic environments. Herein, the ZIF-67@CNT with multidimensional heterogeneous structure were designed and embedded into the polyimide (PI) skeleton to obtain the Co@CNT carbon foams (Co@CNT/CF) by high-temperature annealing. The microstructure, electromagnetic parameters of Co@CNT/CF can be tailored by adjusting the size and the loading of ZIF-67@CNT. The Co@CNT/CF demonstrated a minimum reflection loss of −61.7 dB at 7.3 mm and an effective absorption bandwidth of up to 10.36 GHz at 5.8 mm, covering the entire X and Ku bands. The radar cross section (RCS) distribution indicated that Co@CNT/CF exhibited excellent RCS attenuation capability with the maximum value of 17.1 dB m². Further exploration demonstrated that Co@CNT/CF displayed excellent mechanical properties, flame-retardant and thermal insulation performance, which provides a research strategy for the design of multifunctional EMW absorbing materials in extreme environments.

{"title":"Lightweight, thermal-insulating, flame-retardant Co@CNT composite carbon foam for efficient broadband electromagnetic wave absorption","authors":"Cuiqing Zhou , Junyu Lu , Mushan Yuan , Long Ni , Haichao Meng , Shaoyu Qiu , Mei Liang , Yinfu Luo , Huawei Zou","doi":"10.1016/j.compositesa.2025.108791","DOIUrl":"10.1016/j.compositesa.2025.108791","url":null,"abstract":"<div><div>Constructing efficient and multifunctional integrated electromagnetic wave (EMW) absorbing materials is an effective strategy to address the complex electromagnetic environments. Herein, the ZIF-67@CNT with multidimensional heterogeneous structure were designed and embedded into the polyimide (PI) skeleton to obtain the Co@CNT carbon foams (Co@CNT/CF) by high-temperature annealing. The microstructure, electromagnetic parameters of Co@CNT/CF can be tailored by adjusting the size and the loading of ZIF-67@CNT. The Co@CNT/CF demonstrated a minimum reflection loss of −61.7 dB at 7.3 mm and an effective absorption bandwidth of up to 10.36 GHz at 5.8 mm, covering the entire X and Ku bands. The radar cross section (RCS) distribution indicated that Co@CNT/CF exhibited excellent RCS attenuation capability with the maximum value of 17.1 dB m<sup>2</sup>. Further exploration demonstrated that Co@CNT/CF displayed excellent mechanical properties, flame-retardant and thermal insulation performance, which provides a research strategy for the design of multifunctional EMW absorbing materials in extreme environments.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108791"},"PeriodicalIF":8.1,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MoS2 nanosheet/CF network: Realizing high-efficiency electromagnetic protection and enhanced thermal conductivity via structure–function integration

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-06 DOI: 10.1016/j.compositesa.2025.108790

Jiaqi Zhou , Xiaomin Yuan , Na Sun , Shuhan Yan , Xiumei Zhang , Baoming Wang , Bo Zhu , Xun Cai , Kun Qiao

Carbon fiber reinforced polymer (CFRP) composites that possess both electromagnetic interference (EMI) shielding and thermal conductivity (TC) performances, along with high mechanical strength, are ideal for applications in aerospace and semiconductor industries. In this work, we have successfully integrated a MoS₂ nanosheet/CF network into a structure-functional composite. The interconnection of nanosheets with the resin forms a mechanical interlock, thereby enhancing the interfacial performance of the composite and optimizing its structure, resulting in a 54.64 % increase in interlaminar shear strength (ILSS) to 91.16 MPa. The composite also demonstrates excellent multifunctionality. The high thermal and electrical conductivity of MoS₂ enables the CFs to facilitate the effective transfer of electrons and phonons within the matrix, resulting in a 68.52 % increase in TC. Additionally, the optimized interfacial bonding, along with the synergistic effect of good interfacial polarization and conduction losses, leads to a 53.8 % improvement in EMI shielding performance. Furthermore, the MoS₂ nanosheet/CF network demonstrates superior electromagnetic wave (EMW) absorption performance, achieving a minimum reflection loss (RL_min) of −52.74 dB at a thickness of 1.3 mm and an effective absorption bandwidth (EAB) of 3.92 GHz at 1.2 mm. This approach provides an effective pathway for realizing structure-functional integrated composites.

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引用次数: 0

Organic-Inorganic hybrid polymeric flame retardant coating for fire safety rigid polyurethane foam 用于防火安全硬质聚氨酯泡沫的有机-无机杂化聚合物阻燃涂层

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-06 DOI: 10.1016/j.compositesa.2025.108789

Hongliang Ding , Chuanshen Wang , Jue Wang , Lini Wu , Na Sun , Hongfei He , Lu Liu , Wei Wang , Keqing Zhou , Wei Zhang , Bin Yu

Rigid polyurethane foams (RPUFs) are widely used for their excellent performance but are limited by their flammability. Flame-retardant coatings are an effective solution to address this issue without compromising their mechanical properties. Herein, flame-retardant copolymer poly(HBA-co-VBS) is synthesized via radical copolymerization of hydroxybutyl acrylate (HBA) and sodium 4-vinylbenzenesulfinate (VBS). A series of transition metal oxide-loaded halloysite nanotubes (Mo-HNTs, Co-HNTs) and hexagonal boron nitride (Mo-BN, Co-BN) are synthesized via impregnation method to prepare organic–inorganic hybrid flame-retardant coatings. The coated RPUFs reach V-0 rating in the UL-94 test with higher LOI over 31 %. Co-HNTs sample exhibits the best flame-retardant performance with the lowest PHRR (142.5 kW m⁻²) and lowest THR (49.9 MJ m⁻²). Inorganic nanoparticles reduce toxic gas emissions, especially CO emission, due to the catalysis effect of Mo and Co. This research provides a novel approach to design high-performance flame-retardant coatings.

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